Timer-casing



F. C. HERSEE.

' TIMER CASING.

APPLICATION man SEPT-13, 1918.

I1 ,3 1 2,985 i 4 Patented Aug. 12, 1919.

IIWENTOR A TTORNEY THE COLUMBIA PLANOGRAPH 60.. WASHINGTON, h. c.

. UNITED STATES PATENT canton.

FREDERICK C. HERSEE, 0F WALTHAM, MASSACHUSETTS.

TIMER-CASIN G.

T 0 all whom it may concern:

Be it known that I, FREDERICK (l HERsEn, a citizen of the United States, and a resident of WValtham, in the county of MiddleseX and State of Massachusetts, have invented ccrtain new and useful Improvements in Timer-Casings, of which the following is a specification.

This invention is an improved construction of oil hole or other aperture and closure therefor, for use in various walls, such for instance as those of the casings of timers for internal combustion engines. The object of my improved construction is to facilitate the oiling or lubrication of the working parts within the casing and the main object of my invention is to provide simple and effective means for normally closing the oil hole, which means are inexpensive to manufacture and assemble, and include the minimum number of parts and operations. As an important feature ofmy invention I partially sever a part of the sheet metal wall of the casing to form the oil holeand so design and bend this part, which is attached to and integral with the casing that it lies adjacent to the oil hole and constitutes a support for the oil hole closure, as Well as a stop for the spring of the closure. As a further feature of my invention I attach a bracket to the casing for oscillating the latter in advancing or retarding the spark, and so position this bracket that it acts as a permanent closure for one part of the opening and limits the size of the oil hole in respect to the closure support which v was cut out.

In the accompanying drawings I have illustrated one embodiment of my invention but do not wish to be limited to this specific form as various minor changes may be made within the spirit of my invention without departing from the scope thereof. I have illustrated the invention as applied to and forming a part of a timer casing but I do not wish to be restricted to this particular use as the invention may be utilized in connection with various forms of casings where lubrication of the parts therein is necessary or desirable.

In. these drawings: .7

Figure 1 is an outside end view of the timer casing.

Fig. 2 is an end view looking in the opposite direction to Fig. 1, and

Fig. 3 is a sectional detail on, a very much Specification of Letters Patent. Patented Aug. 12, 1919.

Application filed September 13, 1918.

Serial No. 253,874.

enlarged scale and taken on the line 33 of Fig. 1.

I have shown my invention as applied to a timer casing including a peripheral wall 10 and a conical end wall 11 formed from a single piece of sheet metal. I have not illustrated any of the mechanism within the casing as such mechanism forms no portion of my invention but I have shown the wall 10 apertured to receive contacts. Such mechanisms are shown in my prior Patents 1,128,978 issued February 16, 1915 and 1,203,560 issued October 31, 1916. In praca plane at right angles to the axis. This arm is of any suitable construction to permit of the attachment thereto of means for os cillating the casing. Various means for supporting the casing are commonin the art and form no portion of the present invention.

To facilitate the lubrication of the parts within the casing I punch, out or partially sever from the conical end wall 11 a part to leave the oil hole and form a support for the closure therefor. This is preferably, although not necessarily, in the form of a tongue including a. comparatively narrow neck portion 13 and a substantially circular head portion 14. This leaves in the conical wall a keyhole shaped slot. The tongue extends substantially radially along the conical wall with the head portion 14 toward the center and the integral connection between the neck 13 and the casing wall adjacent to the line of intersection of the peripheral wall 10 and the end wall 11. These are preferred but not essential details as the arrangement of parts may be otherwise particularly as to form and position of the aperture or slot.

The head portion 11 of the tongue is bent to lie substantially parallel tothe circular portion of the keyhole slot from which said head was punched while the neck portion 13 lies at an angle thereto. The circular portion of the keyhole slot constitutesthe oil hole. For closing this I provide a closure including a head 15 and a shank 16. The

head is of such size that it may either merely cover the circular portion of the keyhole slot or may enter or fit into the oil hole and be centered and supported by the edges of the hole. The head 1% of the tongue is perforated to receive the shank 16, the latter being provided with a head or upset portion 17 at its inner end to limit the outward movement of the closure. This may be formed thereon after the parts are assembled. A spring normally holds the closure to its seat. This is shown as a coil spring 18 encircling the shank with one end seatingon the outer surface of the tongue part 1e and the other end on the .undersurface of the closure 15. Preferably the outer surface of the closure 15 is provided with an indentation or recess to aid in the centering of an oil can nozzle and thepressing' of the closure'inwardly by such nozzle.

The baseportion 12 of-the bracket constitutes a permanent closure for a part of the slot andzpreferably has one edge curved so as toapproximately follow the curvature of the closure 15 and defineone side of the 011 opening. It covers the portion of the slot from which the neck 13 was cut and permits the latter to bemade of any length or shape.

Thusthe' bracket serves not only to cover up the-portion of the slot which is not used as an oil hole but also defines one edge .of the hole.

-Having thus described my invention what I claim as new and desireto secure by Letaperture and a. portion spaced from and sub-' stantiallyparallel to said wall opposite to said aperture, and a resilient closure attached to said last'mentioned strip portion.

3. In combination, a sheet metal wall having a strip partially severed therefrom to leave an aperture, said strip having one end integral with said wall at one side of said aperture and a. portion spaced from and substantiallyiparal'lel to said wall opposite to said aperture,-and a closure including a closure head and. a stem slidable through said last mentioned stripiportion.

4. In combinatioin-a sheet metal-wall having a keyhole shaped tongue out therefrom to 'leave .a keyhole shaped aperture, said tongue having the narrow end thereof integral with said wall at one end of said aper ture and having 1ts circular head portion opposite to and substantially parallel with the circular portion of said aperture, and a member supported within said aperture and by said tongue.

5. In combination, a sheet metal wall having a strip partially severed therefrom to leave'an' aperture, a portion of said strip be ing spaced from said wall opposite to said aperture and a closure including a closure head for said aperture, a stem slidable through said strip, and a coil spring en- V circling sa d stem between said head and said strip.

. 6. In combination, a sheet metal wall having a keyhole shaped aperture therein, and I means for closlng said aperture including a tongue having one end integral with said wallat one side of said aperture, and a sepa rate closure head secured to said tongue at the opposite end thereof.

7. In combination, a sheet metal wall having a part partially severed to leave an elongated opening, a rigid closure for one end of said opening, and a movable closure for the other end attached to the partially V severed part.

' 8. y In combination, a sheet metal wall having a part partially severed to leave an elongated opening, a rigid closure for one end of said opening, and a movable closure for the other end resiliently connected to and carried by said partially severed part.

9. Atimer casing having a keyhole shaped partpartially severed from the wall thereof to leave a keyhole shaped opening, a bracket for oscillating said casing, and forming a permanent cover for the narrow portion of said opening, and means carried by the partially severed part for closing the circular portion of the opening.

, 10. A sheet metal timer casing having an oil hole, a tongue integral with said casing and having a portion opposite to said oil hole, and a closure for said oil hole including a closure head and a stem supported by said tongue.

11. A sheet metal timer casing having an oil hole therethrough, a tongue having one end rigid with the casing wall and having the other end disposed opposite to and substantially parallel with said oil hole, a closure including a closure head at said oil hole and a stem extending through and guided by said tongue and a coil spring encircling said stem between said head and said tongue.

7 Signed at VValtham, in the county of MiddleseX and State of Massachusetts, this tenth day of September, A. D. 1918.

FREDERICK C. HERSEE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

